US20100136705A1 - Method for measuring concentration of peroxycarboxylic acid and apparatus therefor - Google Patents

Method for measuring concentration of peroxycarboxylic acid and apparatus therefor Download PDF

Info

Publication number
US20100136705A1
US20100136705A1 US12/451,046 US45104608A US2010136705A1 US 20100136705 A1 US20100136705 A1 US 20100136705A1 US 45104608 A US45104608 A US 45104608A US 2010136705 A1 US2010136705 A1 US 2010136705A1
Authority
US
United States
Prior art keywords
concentration
light
acid
measurement
peroxycarboxylic acid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/451,046
Other languages
English (en)
Inventor
Sachiko Kojima
Taro Furuta
Toshio Kasai
Dock-Chil Che
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saraya Co Ltd
Original Assignee
Saraya Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39925767&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20100136705(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Saraya Co Ltd filed Critical Saraya Co Ltd
Assigned to SARAYA CO., LTD. reassignment SARAYA CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FURUTA, TARO, CHE, DOCK-CHIL, KASAI, TOSHIO, KOJIMA, SACHIKO
Publication of US20100136705A1 publication Critical patent/US20100136705A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
    • G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
    • G01N31/228—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators for peroxides
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N2021/7769—Measurement method of reaction-produced change in sensor
    • G01N2021/7783—Transmission, loss
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
    • G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T436/00—Chemistry: analytical and immunological testing
    • Y10T436/20—Oxygen containing
    • Y10T436/200833—Carbonyl, ether, aldehyde or ketone containing
    • Y10T436/201666—Carboxylic acid

Definitions

  • the present invention relates to a method for measuring only the concentration of a peroxycarboxylic acid in an equilibrium mixture containing the peroxycarboxylic acid and hydrogen peroxide and an apparatus used for the measurement.
  • Equilibrium mixtures containing peroxycarboxylic acid (specifically, peracetic acid) and hydrogen peroxide are utilized in broad areas such as various oxidation reactions, and sterilization in medical treatment, food, environment area and the like. Especially, when it is used for the purpose of sterilization, a lower limit of its concentration for use is defined in many cases, in order to keep the availability thereof. However, the concentration of peroxycarboxylic acid is reduced with time, since peroxycarboxylic acid, compound is unstable in general. Thus it is desirable that exact concentration of peroxycarboxylic is always recognized.
  • peroxycarboxylic acid exists as an equilibrium mixture of peroxycarboxylic acid and carboxylic acid, hydrogen peroxide, water. Further, the two peroxide compounds, peroxycarboxylic acid and hydrogen peroxide have similar characteristics (i.e. oxidizability) to each other. Therefore, the fractionation and the quantitative determination between the two peroxide compounds are considerably difficult.
  • a titration method there is a method in which, by utilizing the difference in oxidizability between peroxycarboxylic acid and hydrogen peroxide, fractionating hydrogen peroxide and determining quantity thereof by using cerium sulfate or permanganic acid potassium, and fractionating peroxycarboxylic acid (such as peracetic acid) and determining quantity thereof by using sodium thiosulfate.
  • cerium sulfate or permanganic acid potassium fractionating peroxycarboxylic acid (such as peracetic acid) and determining quantity thereof by using sodium thiosulfate.
  • the method that is most inexpensive and simplest and is used in many actual locations is a method using a test paper.
  • This is a method of immersing a test paper to which a color-developing agent is fixed into a solution to be examined, and deciding the concentration in accordance with the color development degree thereof.
  • the decision is based on color sense; accordingly, the concentration cannot be precisely obtained as a numerical value.
  • the criterion of the decision is vague; thus, there is often caused a problem that results of the decision are varied depending on testing persons.
  • Patent Document 1 Japanese Patent No. 3170526
  • Patent Document 2 Japanese Patent No. 3813606
  • Patent Document 3 Japanese Patent Laid-Open Publication No. 2006-242629
  • Non-Patent Document 1 The Analyst, published by Royal Society of Chemistry, August in 1962, vol. 87, p. 653
  • a main object of the present invention is to provide a method for determining only the concentration of a percarboxylic acid easily, rapidly and precisely in an equilibrium mixture of the percarboxylic acid and hydrogen peroxide, and a measuring apparatus used in this measuring method.
  • the measuring method according to the present invention is characterized by adding potassium iodide to an equilibrium mixture containing a percarboxylic acid and hydrogen peroxide, thereby generating iodine, and then measuring the amount of light that goes through this mixture, thereby determining the concentration of the percarboxylic acid quantitatively.
  • the concentration of the percarboxylic acid in the measurement sample is preferably from 0.01 to 50 ppm.
  • a solution having a percarboxylic acid concentration not less than this range may be used in the state that the solution is diluted to set the concentration of the percarboxylic acid into this concentration range. Outside this range, the error of the measured value is large so that a difference thereof from an actual concentration of the percarboxylic acid may be generated.
  • the pH value of the measurement sample is preferably within a range of 1 ⁇ pH ⁇ 6. If the pH is 6 or more, the amount of generated iodine is gradually reduced. On the other hand, if the pH is 1 or less, hydrogen peroxide, which exists together, reacts with potassium iodide to generate iodine, so that the amount of iodine is gradually increased. It therefore becomes difficult to obtain a precise concentration of the percarboxylic acid.
  • the amount of potassium iodide in the measurement sample is preferably from 2 to 60 times the number of moles of the percarboxylic acid, more preferably from 3 to 30 times the number, and most preferably from 3 to 15 times the number. If the amount of potassium iodide in the measurement sample is less than 2 times the number of moles of the percarboxylic acid, potassium iodide is insufficient for the amount required for the reaction of potassium iodide with the percarboxylic acid. On the other hand, if the amount is more than 60 times, hydrogen peroxide, which exists together, reacts with potassium iodide to generate iodine, so that the amount of iodine is gradually increased. It therefore becomes difficult to obtain a precise concentration of the percarboxylic acid.
  • the wavelength of the light used in the measurement is preferably within a range of 440 to 600 nm. If the wavelength is shorter than 440 nm, the peak overlaps with a peak of a polyiodide ion having an absorption maximum near 350 nm. On the other hand, if the wavelength is longer than 600 nm, the light is weakly absorbed. As a result, it may become difficult to obtain a precise concentration of the percarboxylic acid.
  • the percarboxylic acid that can be quantitatively determined by the method of the invention may be any percarboxylic acid that is reactive with potassium iodide to generate iodine rapidly.
  • percarboxylic acids peracetic acid is most widely used, and the concentration of peracetic acid can be quantitatively determined easily and rapidly by the method of the invention.
  • a small-sized and inexpensive apparatus for measuring the concentration of a percarboxylic acid can be realized by using a light-emitting diode (LED) as a light source, detecting transmitted light that is emitted from this light source and goes through a measurement sample by means of a photodiode, and then obtaining the concentration of the percarboxylic acid therein on the basis of the detected result.
  • LED light-emitting diode
  • the concentration of a percarboxylic acid can be precisely measured in an equilibrium mixture of the percarboxylic acid and hydrogen peroxide without receiving an effect of hydrogen peroxide. Moreover, the concentration can be quantitatively determined easily and rapidly by use of a small sample amount since the measurement is made with reference to the light amount. Furthermore, from a minute amount of potassium iodide, iodine is generated to color the sample; therefore, an especial color developing agent or reagent as in the prior art is not required. Thus, an analyzing method clean from an environmental viewpoint can be provided.
  • FIG. 1 The drawing is a graph showing a correspondence between the concentration of peracetic acid in a measurement sample calculated by iodometric titration and the absorbance at each of 440, 470 and 600 nm according to an ultraviolet-visible spectrophotometer in Example 1.
  • FIG. 2 The drawing is a graph showing a correspondence between the concentration of peracetic acid in a measurement sample calculated by iodometric titration and the voltage measured by a 470-nm wavelength LED/photodiode method in Example 1.
  • FIG. 3 The drawing is a graph showing a correspondence between the concentration of perpropionic acid in a measurement sample calculated by iodometric titration and the voltage measured by a 470-nm wavelength LED/photodiode method in Example 4.
  • FIG. 4 The drawing is a graph showing a correspondence between the concentration of peracetic acid in a measurement sample calculated by iodometric titration and the voltage measured by a 470-nm wavelength LED/photodiode method in Example 5.
  • FIG. 5 The drawing is a graph showing a change with time in the measured voltage when each of potassium iodide solutions having pHs of 3, 6 and values therebetween, respectively, was used to measure peracetic acid in Example 6.
  • FIG. 6 The drawing is a graph showing a change with time in the measured voltage when each of potassium iodide solutions having pHs of 1, 3 and a value therebetween, respectively, was used to measure hydrogen peroxide in Example 6.
  • FIG. 7 The drawing is a graph showing a change with time in the absorbance when peracetic acid was measured while the concentration of a potassium iodide solution was varied in Example 7.
  • FIG. 8 The drawing is a perspective view of the whole of a measuring apparatus used to measure the concentration of a percarboxylic acid according to an embodiment of the invention.
  • FIG. 9 The drawing is an explanatory view which schematically illustrates a main portion of the measuring apparatus.
  • FIG. 10 The drawing is a block diagram which schematically illustrates the structure of a control analysis section of the measuring apparatus.
  • LEDs light-emitting elements
  • FIG. 8 is a perspective view of the whole of the measuring apparatus, which is used to measure the concentration of a percarboxylic acid according to the present embodiment
  • FIG. 9 is an explanatory view which schematically illustrates a main portion of the measuring apparatus.
  • an apparatus 10 which is the measuring apparatus according to the embodiment, has, as main constituting elements thereof, a driving force section 11 which is equipped with a power source 20 (or is to be connected to an external power source), a measuring section 12 equipped with an injection region 12 b in which a measurement sample (equilibrium mixture containing a percarboxylic acid and hydrogen peroxide) is to be injected, and a control analysis unit 13 for controlling the driving force section 11 and the measuring section 12 and further determining the concentration of the measurement sample quantitatively.
  • a driving force section 11 which is equipped with a power source 20 (or is to be connected to an external power source)
  • a measuring section 12 equipped with an injection region 12 b in which a measurement sample (equilibrium mixture containing a percarboxylic acid and hydrogen peroxide) is to be injected
  • a control analysis unit 13 for controlling the driving force section 11 and the measuring section 12 and further determining the concentration of the measurement sample quantitatively.
  • the measuring section 12 is equipped with a sample container 30 , the form of which is, for example, cylindrical, for containing the measurement sample injected from the injection region 12 b, a light-emitting section 21 arranged on one side (the left side in FIG. 9 ) of the sample container 30 , and a light-receiving section 31 arranged oppositely to the light-emitting section 21 so as to interpose the sample container 30 therebetween.
  • the sample container 30 is preferably made of a material having chemical resistance and a high light transmissibility, and is made of, for example, glass in the embodiment. Instead of glass, any material may be used as far as the material has light transmissibility and chemical resistance to some degree or more, examples thereof being acrylic resin, vinyl chloride resin and PET resin.
  • the light-emitting section 21 is a section for emitting light of a predetermined wavelength toward the measurement sample contained in the sample container 30 , and has plural light sources 25 (light-emitting elements) connected through a light-emitting circuit 22 to the power source 20 .
  • These light-emitting elements 25 are made of, for example, high-illuminance LEDs (light-emitting diodes) which emit light rays having different wavelengths, respectively, and are preferably arranged in parallel to the longitudinal axis of the sample container 30 .
  • the light-emitting circuit 22 has a predetermined resistor 23 and a changeover switch 24 (for example, a known rotary switch).
  • the light-emitting elements 25 are each connected switchably to the changeover switch 24 . In accordance with a control signal from the control analysis unit 13 , one or more elements used as one or more light sources, out of the light-emitting elements 25 , can be switched.
  • the light-receiving section 31 is a section for receiving light that is emitted from the light-emitting section 21 and goes through the sample container 30 and the measurement sample therein, and is equipped with a light-receiving element 32 made of, for example, a silicon (Si) photodiode.
  • This light-receiving element 32 is preferably arranged in parallel to the longitudinal axis of the sample container 30 and over a scope in which transmitted light from all of the light-emitting elements 25 , each of which is used as a light source, can be received.
  • a voltage measurement section 34 is connected through a light-receiving circuit 33 to the light-receiving element 32 , the section 34 being a section for measuring a voltage generated when light which goes through the sample container 30 and the measurement sample is received by the photodiode. Any measured result of the voltage measurement section 33 is inputted, as a signal, into the control analysis unit 13 .
  • This voltage measurement section 34 is a section using a structure known in the prior art for detecting a voltage change when a light-receiving sensor receives light.
  • FIG. 10 is a block diagram which schematically illustrates the structure of the control analysis unit 13 .
  • the control analysis unit 13 has a power source control section 42 for controlling the turning-on and turning-off of the power source 20 , the electric power amount to be supplied, and others, and a control section 41 having a light source control section 43 for controlling the changeover state of the light sources (light-emitting elements 25 ) through the changeover switch, and others.
  • the control analysis unit 13 has an analysis section 45 having a comparative calculation section 46 into which any measured result from the voltage measurement section 34 is inputted as a signal.
  • the control analysis unit 13 is preferably made mainly of a microcomputer, and is connected to the power source 20 , the changeover switch 24 , the voltage measurement section 34 and others in such a manner that the unit 13 can receive signals therefrom and can give signals thereto.
  • the analysis section 45 has a memory section 47 connected to the comparative calculation section 46 in such a manner that the section 46 can receive signals from the section 47 and can give signals to the section 47 .
  • the following correlation data about each of light rays having different wavelengths is memorized in the memory section 47 so as to be readable: a correlation data between the voltage value generated when the light which goes through each of various measurement samples is received by the photodiode and the concentration.
  • This memory section 47 may be set, as an external memory, outside the control analysis unit 13 .
  • the concentration of the sample to be measured can be obtained.
  • the thus-obtained concentration can be outputted through an outputting section 48 to a display section (not illustrated) of the measuring apparatus 10 , such as a display thereof, or a printing device (not illustrated), such as a printer.
  • Example 1 a 6%-peracetic acid antiseptic solution (trade name: ACECIDE manufactured by Saraya Co., Ltd. was diluted 20 times with distilled water, and the resultant was used as a test solution.
  • the concentration of peracetic acid in the test solution was obtained by iodometric titration. As a result, the concentration of peracetic acid was 0.356%.
  • FIG. 2 results obtained by measuring the voltage generated when one of the light-emitting elements 25 (LEDs) having a wavelength of 470 nm was used as a light source in the measuring apparatus 10 and light going through each of the measurement samples was received by the light-receiving element 32 (photodiode).
  • LEDs light-emitting elements 25
  • photodiode the light-receiving element 32
  • the correlation coefficient R 2 of the regression formulae corresponding to the measured results in FIG. 1 is 0.9927 when the wavelength is 440 nm, 0.9978 when it is 470 nm, and 0.9980 when it is 600 nm. It is understood that in these cases, an excellent linearity can be obtained; however, when the wavelength is 430 nm, R 2 is 0.9758 so that the linearity is declined.
  • the correlation coefficient R 2 of the regression formula corresponding to the measured results is 0.9950.
  • the measuring apparatus 10 of the embodiment collect a correlation data showing a relationship between the voltage value generated when light going through each of various measurement samples (equilibrium mixture of hydrogen peroxide and each of percarboxylic acids) is received by the photodiode 32 about each of the light sources 25 (light-emitting diodes: LEDs) having the difference wavelengths, respectively, and the concentration; store the data, the number of which is large, into the memory section 47 ; read out the corresponding data in accordance with the species of a measurement sample and the used light source; and make a comparative calculation.
  • the following method will be referred to as the “LED/photodiode method”: a method using the measuring apparatus 10 of the embodiment, wherein the light-emitting elements 25 (LEDs) of the predetermined wavelengths are used as light sources, to measure the voltage generated when light going through a measurement sample is received by the light-receiving element 32 (photodiode), and then obtaining the concentration in the measurement sample on the basis of the measured value.
  • LEDs light-emitting elements 25
  • photodiode photodiode
  • Example 2 appropriate amounts of distilled water were each added to the test solution in Example 1. In this way, peracetic acid solutions having four concentrations different from each other (samples 1 to 4) were prepared. By iodometric titration, each of the peracetic acid concentrations was quantitatively determined two times.
  • Example 3 a 6%-peracetic acid antiseptic solution (trade name: ACECIDE manufactured by Saraya Co., Ltd. diluted 20 times with distilled water, and the resultant was used as a test solution.
  • a 6%-peracetic acid antiseptic solution (trade name: ACECIDE manufactured by Saraya Co., Ltd. diluted 20 times with distilled water, and the resultant was used as a test solution.
  • To 0.2 mL of the test solution were added 240 mg/L of a potassium iodide solution and each of 0 mL, 1 mL and volumes therebetween of 1% hydrogen peroxide water to set the total volume to 20 mL (measurement samples).
  • the LED (470 nm)/photodiode method was used to measure each of the samples three times.
  • results obtained by calculating the peracetic acid concentration in the test solution are shown in Table 2.
  • This test solution concentration was quantitatively determined by iodometric titration. As a result, the concentration of peracetic acid was 0.356% and that of hydrogen peroxide was 0.446%. In the measurement sample wherein this was used in an amount of 0.2 mL, the amount of peracetic acid was 0.0094 mmol, and that of hydrogen peroxide was 0.026 mmol. As shown in Table 2, even when hydrogen peroxide was added to this to increase the total amount thereof to 0.320 mmol, the measured value and the calculated concentration of peracetic acid in the test solution were hardly affected.
  • Example 4 240 mg/L of a potassium iodide solution was added to each of 0.2 mL, 1.5 mL and volumes therebetween of a 0.03% perpropionic acid solution to prepare a measurement sample having a total volume of 20 mL.
  • the LED (470 nm)/photodiode method was then used to measure the voltage therein.
  • Example 5 240 mg/L or 480 mg/L of a potassium iodide solution was added to each of 0.05 mL, 1.0 mL and volumes therebetween of peracetic acid (the concentration of peracetic acid was 0.355% according to iodometric titration) to prepare a measurement sample having a total volume of 20 mL.
  • the LED (470 nm)/photodiode method was then used to measure the voltage therein. The measured results are shown in FIG. 4 .
  • the peracetic acid amount was from 0.05 to 0.3 mL (corresponding to peracetic acid concentrations of 8.9 to 53 ppm in the measurement samples)
  • a linear relationship was recognized between the peracetic acid concentrations (ppm) in the measurement samples and the measured values (voltage values: V).
  • the measured values (V) deviated from a straight line about each of the potassium iodide concentrations.
  • Example 6 an effect produced by the pH of measurement samples was examined. To 0.2 mL of about 0.35% peracetic acid was added each of potassium iodide solutions which were each 240 mg/L in volume and had pHs of 3, 6 and values therebetween, respectively, the pHs being adjusted with citric acid and sodium citrate. In this way, each measurement sample having a total volume of 20 mL was prepared. The LED (470 nm)/photodiode method was then used to measure the voltage therein. A change in the voltage value over 10 minutes from the end of the preparation of each of the measurement samples is shown in FIG. 5 .
  • each measurement sample having a total volume of 20 mL was prepared.
  • the LED (470 nm)/photodiode method was then used to measure the voltage therein over 10 minutes, and a change in the voltage value is shown in FIG. 6 .
  • the measured values were stable in the pH range of 3 to 5; however, when the pH value was turned to 6, the measured values were unstable. Moreover, according to FIG. 6 , when the pH value was lowered to 1, the measured values were unstable since hydrogen peroxide and potassium iodide reacted slowly with each other to generate iodine.
  • Example 7 an effect of the amount of potassium iodide was examined.
  • 0.2 mL (0.0094 mmol) of a 0.331% peracetic acid solution was added each of potassium iodide solutions the mole numbers of which were 2, 3, 15, 30, 60 and 90 times that of the acid, respectively.
  • each measurement sample having a total volume of 20 mL was prepared.
  • 0.84 mmol of potassium iodide was contained in the solution having a volume of 20 mL.
  • the absorbance was measured at 470 nm, and a change in the absorbance after the preparation of each of the measurement samples is shown in FIG. 7 .
  • the present invention can be effectively used in the case of measuring only the concentration of a percarboxylic acid easily and quickly in an equilibrium mixture containing the percarboxylic acid and hydrogen peroxide.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Molecular Biology (AREA)
  • Biophysics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Plasma & Fusion (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
US12/451,046 2007-04-25 2008-04-25 Method for measuring concentration of peroxycarboxylic acid and apparatus therefor Abandoned US20100136705A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2007-141053 2007-04-25
JP2007141053 2007-04-25
PCT/JP2008/058024 WO2008133321A1 (ja) 2007-04-25 2008-04-25 過カルボン酸濃度測定方法およびその装置

Publications (1)

Publication Number Publication Date
US20100136705A1 true US20100136705A1 (en) 2010-06-03

Family

ID=39925767

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/451,046 Abandoned US20100136705A1 (en) 2007-04-25 2008-04-25 Method for measuring concentration of peroxycarboxylic acid and apparatus therefor

Country Status (3)

Country Link
US (1) US20100136705A1 (ja)
JP (1) JP4359336B2 (ja)
WO (1) WO2008133321A1 (ja)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140273244A1 (en) * 2013-03-15 2014-09-18 Ecolab Usa Inc. Automatic titrator
US9766183B2 (en) 2014-09-17 2017-09-19 Ecolab Usa Inc. Automatic titrator
CN108107039A (zh) * 2017-11-27 2018-06-01 广东环凯微生物科技有限公司 一种过氧乙酸测定试纸及其测定方法
US10379091B2 (en) 2014-09-17 2019-08-13 Ecolab Usa Inc. Automatic titrator
WO2019204182A1 (en) 2018-04-19 2019-10-24 Chemtreat, Inc. Methods and systems for monitoring peroxyacid content in a fluid
US11185893B2 (en) 2019-05-31 2021-11-30 Ecolab Usa Inc. Peracid compositions with conductivity monitoring capability
US11333610B2 (en) 2017-02-14 2022-05-17 Saraya Co., Ltd. Percarboxylic acid concentration determination tool and indicator solution used in preparing same
US11397170B2 (en) 2018-04-16 2022-07-26 Ecolab Usa Inc. Repetition time interval adjustment in adaptive range titration systems and methods
US11397171B2 (en) 2017-09-18 2022-07-26 Ecolab Usa Inc. Adaptive range flow titration systems and methods with sample conditioning
US11454619B2 (en) 2018-04-09 2022-09-27 Ecolab Usa Inc. Methods for colorimetric endpoint detection and multiple analyte titration systems

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8071390B2 (en) 2007-06-05 2011-12-06 Ecolab Usa Inc. Temperature stabilized optical cell and method
US8119412B2 (en) 2007-06-05 2012-02-21 Ecolab Usa Inc. Kinetic determination of peracid and/or peroxide concentrations
US8076154B2 (en) 2007-06-05 2011-12-13 Ecolab Usa Inc. Method of calibration for nonlinear optical sensor
CN109187399A (zh) * 2018-07-23 2019-01-11 华侨大学 一种快速测定溶液中过氧乙酸和过氧化氢含量的方法
JP6995329B1 (ja) 2021-09-06 2022-01-14 サラヤ株式会社 過カルボン酸濃度測定用指示薬、それを用いた過カルボン酸濃度測定方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485588A (en) * 1966-04-22 1969-12-23 Celanese Corp Method for continuous peracetic acid analysis
US4680271A (en) * 1984-01-21 1987-07-14 Interox Chemicals Limited Process and apparatus for analysis
US5438002A (en) * 1990-03-16 1995-08-01 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Colorimetric processes for the determination and control of the peracid content in a solution, in the presence of hydrogen peroxide
US6329207B1 (en) * 1999-02-11 2001-12-11 Steris Corporation Wet chemical indicator for the evaluation of peracetic acid chemistries

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3743224A1 (de) * 1987-12-19 1989-06-29 Merck Patent Gmbh Verfahren und reagenz zur bestimmung von persaeuren
JP3170526B2 (ja) * 1992-10-16 2001-05-28 日本パーオキサイド株式会社 過酢酸と過酸化水素の分別定量方法
JP3504939B2 (ja) * 2002-04-04 2004-03-08 理工協産株式会社 過酢酸、過酸化水素同時分別分析法
JP2008014685A (ja) * 2006-07-04 2008-01-24 Fujifilm Corp 殺菌用水性組成物の判定用具

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485588A (en) * 1966-04-22 1969-12-23 Celanese Corp Method for continuous peracetic acid analysis
US4680271A (en) * 1984-01-21 1987-07-14 Interox Chemicals Limited Process and apparatus for analysis
US5438002A (en) * 1990-03-16 1995-08-01 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Colorimetric processes for the determination and control of the peracid content in a solution, in the presence of hydrogen peroxide
US5756358A (en) * 1990-03-16 1998-05-26 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Colorimetric processes for the determination and control of the peracid content in a solution, in the presence of hydrogen peroxide
US6329207B1 (en) * 1999-02-11 2001-12-11 Steris Corporation Wet chemical indicator for the evaluation of peracetic acid chemistries

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140273244A1 (en) * 2013-03-15 2014-09-18 Ecolab Usa Inc. Automatic titrator
US8980636B2 (en) * 2013-03-15 2015-03-17 Ecolab Usa Inc. Automatic titrator
US9766183B2 (en) 2014-09-17 2017-09-19 Ecolab Usa Inc. Automatic titrator
US10379091B2 (en) 2014-09-17 2019-08-13 Ecolab Usa Inc. Automatic titrator
US11333610B2 (en) 2017-02-14 2022-05-17 Saraya Co., Ltd. Percarboxylic acid concentration determination tool and indicator solution used in preparing same
US11397171B2 (en) 2017-09-18 2022-07-26 Ecolab Usa Inc. Adaptive range flow titration systems and methods with sample conditioning
CN108107039A (zh) * 2017-11-27 2018-06-01 广东环凯微生物科技有限公司 一种过氧乙酸测定试纸及其测定方法
US11454619B2 (en) 2018-04-09 2022-09-27 Ecolab Usa Inc. Methods for colorimetric endpoint detection and multiple analyte titration systems
US11397170B2 (en) 2018-04-16 2022-07-26 Ecolab Usa Inc. Repetition time interval adjustment in adaptive range titration systems and methods
WO2019204182A1 (en) 2018-04-19 2019-10-24 Chemtreat, Inc. Methods and systems for monitoring peroxyacid content in a fluid
EP3780959A4 (en) * 2018-04-19 2021-12-15 Chemtreat, Inc. METHODS AND SYSTEMS FOR MONITORING PEROXY ACID CONTENT IN A FLUID
US11185893B2 (en) 2019-05-31 2021-11-30 Ecolab Usa Inc. Peracid compositions with conductivity monitoring capability

Also Published As

Publication number Publication date
JPWO2008133321A1 (ja) 2010-07-29
WO2008133321A1 (ja) 2008-11-06
JP4359336B2 (ja) 2009-11-04

Similar Documents

Publication Publication Date Title
US20100136705A1 (en) Method for measuring concentration of peroxycarboxylic acid and apparatus therefor
EP1130382B1 (en) Optical sensor for sensing multiple analytes
US10302564B2 (en) Water quality analyzer
US9696261B2 (en) Multi-channel device and method for measuring optical properties of a liquid
EP1730495B1 (en) Ozone concentration sensor
JP5833627B2 (ja) 蛍光センサ
JP3343156B2 (ja) 光学式成分濃度測定装置および方法
Tymecki et al. Paired emitter detector diode (PEDD)-based photometry–an alternative approach
JP2015518157A (ja) 溶液中の物質の吸光度を測定する方法並びに装置
CN102262061A (zh) 一种在线检测二氧化氯气体浓度的方法和装置
KR102689281B1 (ko) 성분 측정 장치, 성분 측정 방법 및 성분 측정 프로그램
JP2006500560A (ja) ケモクロミックセンサならびにケモクロミック試薬および試験材料の検知方法
DE69213827D1 (de) Merocynanine als Eiweissfehler-Indikatoren
US7688439B2 (en) Optical measuring system
ATE443858T1 (de) Datenverarbeitungseinrichtung für röntgenfluoreszenzspektroskopie, welche die empfindlichkeit des messgerätes für die chemischen elemente unabhängig von messbedingungen berücksichtigt
JP4722513B2 (ja) 過酢酸を含む酸溶液の濃度測定のための装置および方法
US7943910B2 (en) Method and device for determining the fluorescence of a sample and use thereof
JPH11295220A (ja) 液体試料検査方法、および液体試料検査装置
US4877583A (en) Fluorescent analyzer
US9470572B2 (en) Method and apparatus for measuring liquid level of cell culture solution
WO2007135922A1 (ja) 光源装置及び分析装置
JP2002228658A (ja) 分析装置
CA2299881C (en) Method and apparatus for photometric analysis of chlorine dioxide solutions
JP3697430B2 (ja) 水中微量成分の測定方法及び装置
JPH08313429A (ja) 分光光度計用セル

Legal Events

Date Code Title Description
AS Assignment

Owner name: SARAYA CO., LTD.,JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KOJIMA, SACHIKO;FURUTA, TARO;KASAI, TOSHIO;AND OTHERS;SIGNING DATES FROM 20091201 TO 20091216;REEL/FRAME:023747/0907

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION